I had an online friend who was SO conceited that he simply assumed that the whole universe consisted of himself (with everything else sort of devolving into him as though it were a cloud of 'stuff' orbiting around him).

That assumption went so deep it really was his philosophy/lifevalue/religion.

I had no idea at first; I thought he was a normal human being who ran a blog featuring vintage furniture, old photographs and (of course) himself. But it soon became obvious that his real interest was simply HIMSELF and everything else was seen (above) the particles-circling-the-centre-of-the-universe-which-he-was-sure-was-himself.

He started to become 'standoffish' without any explanation - he thought it would make me 'come and orbit around him like he thought everything else in the universe already did'.

Then it turned out that the antique furniture and old photograph posts were SOMEONE ELSE'S IDEA - not his at all. The associate who encouraged him to make those posts said (roughly) "You have to offer people SOMETHING when they come to your blog." The associate ought to have run their own blog, rather than wasting their time trying to help Mr-I'M-the-centre-of-the-universe-which-goes-without-saying. He wasn't help-able. What was this 'offer people something' business? Everyone revolved around him, if he did say so himself!